geo.wikisort.org - Mountains

Search / Calendar

Mount Griggs, formerly known as Knife Peak Volcano, is a stratovolcano, which lies 10 km behind the volcanic arc defined by other Katmai group volcanoes. Although no historic eruptions have been reported from Mount Griggs, vigorously active fumaroles persist in a summit crater and along the upper southwest flank. The fumaroles on the southwest flank are the hottest, and some of the flank fumaroles can roar so loudly that they can be heard from the valley floor.[1] The slopes of Mount Griggs are heavily mantled by fallout from the 1912 eruption of Novarupta volcano.[3] The summit consists of three concentric craters, the lowest and largest of which contains a recent summit cone topped by two craters. The volume of the volcanic edifice is estimated at about 25 cubic kilometers (6.0 cu mi). Isotopic analysis indicates that the source of Griggs' magma is distinct from the other Katmai volcanoes.[4]

Mount Griggs
NW view from west rim of Katmai caldera, July 1990
Highest point
Elevation7,602 ft (2,317 m)[1]
Prominence7,300 ft (2,200 m)
Listing
  • North America prominent 60th
  • North America isolated 91st
Coordinates58°21′26″N 155°06′13″W[2]
Geography
Mount Griggs
Alaska
LocationKatmai National Park and Preserve, Lake and Peninsula Borough, Alaska, U.S.
Parent rangeAleutian Range
Topo mapUSGS Mount Katmai B-4
Geology
Mountain typeStratovolcano
Volcanic arc/beltAleutian Arc
Last eruption1790 BCE ± 40 years

The mountain was named for Dr. Robert Fiske Griggs (1881–1962), botanist, whose explorations of the area, after the eruption of Mount Katmai in 1912, led to the creation of Katmai National Monument by President Woodrow Wilson in 1918.[5]

Map showing volcanoes of Alaska with the mark set at the location of Mount Griggs
Map showing volcanoes of Alaska with the mark set at the location of Mount Griggs

See also



References


  1. "Griggs". Global Volcanism Program. Smithsonian Institution. Retrieved 2020-09-09.
  2. "Griggs". Alaska Volcano Observatory. Retrieved 2010-03-30.
  3. "Volcanoes of the Alaska Peninsula and Aleutian Islands-Selected Photographs - Album". U.S. Geological Survey. Retrieved 2010-03-30.
  4. "Mount Griggs description and information". Alaska Volcano Observatory. U.S. Geological Survey. Retrieved 20 February 2019.
  5. "Mount Griggs". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved 2010-03-30.



На других языках

[de] Mount Griggs

Der Mount Griggs ist ein 2317 Meter hoher Stratovulkan der Aleutenkette auf der Alaska-Halbinsel. Er liegt im Katmai-Nationalpark am nordöstlichen Rand des Valley of Ten Thousand Smokes und in Sichtweite des Mount Katmai.
- [en] Mount Griggs

[fr] Mont Griggs

Le mont Griggs est un stratovolcan situé dans le Sud de l'Alaska, à 10 km de l'arc volcanique du mont Katmai.

[ru] Григгс (вулкан)

Григгс — стратовулкан, расположенный на Аляске, США. Альтернативное название вулкана англ. Knife Peak Volcano. Вулкан назван в честь американского ботаника Роберта Григгса.


Текст в блоке "Читать" взят с сайта "Википедия" и доступен по лицензии Creative Commons Attribution-ShareAlike; в отдельных случаях могут действовать дополнительные условия.

Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.

2019-2024
WikiSort.org - проект по пересортировке и дополнению контента Википедии